Method

First of all, you need to make the marinade.

To do this, use a pestle and mortar to crush the garlic with about ½ teaspoon of salt until it becomes a purée. Next, add the grated ginger. Then chop the chilli and coriander and mix these with the garlic and ginger, along with the turmeric and some freshly milled black pepper. After that, pour the buttermilk into a bowl and whisk the other ingredients into it.

Now cut each chicken breast into five pieces, add them to the bowl and give everything a good stir. Then press the chicken down well into the marinade, cover the surface with clingfilm and pop the bowl into the fridge for a few hours or, preferably, overnight. When you are almost ready to cook the chicken, soak the skewers in hot water for 30 minutes (to prevent them burning).

Pre-heat the grill to its highest setting for at least 10 minutes and line the grill pan with kitchen foil. Next, dry the skewers in a clean tea cloth and thread half a bay leaf on to each one, then a piece of chicken, a piece of onion and a piece of pepper. Carry on alternating the bay leaf, chicken, onion and pepper until you have threaded five pieces of chicken on to each skewer, finishing with half a bay leaf on each. Make sure you pack everything together as tightly as possible, then season with salt and freshly milled black pepper and brush the vegetables with a minute amount of oil. Lay the brochettes on the grill rack and place them under the grill, about 4 inches (10 cm) from the heat source. Brush liberally with some of the remaining marinade and grill them for 10 minutes, before turning them over and grilling them for a further 10 minutes, brushing them with more of the marinade as they cook, and watching them carefully so they don’t burn.

While the chicken is cooking, place the couscous in a largeish bowl, then pour the boiling stock over it, add some salt and freshly milled black pepper and stir it with a fork. Then leave it on one side for 5 minutes, by which time it will have absorbed all the stock and softened. After that, fluff it up by making cutting movements across and through it with a knife. Then stir in the remaining couscous ingredients and season to taste.

When the chicken is ready, pop the brochettes on top of the couscous and serve straight away on warmed serving plates, garnished with the wedges of lime.